SALES - Information SERVICE - Information
Marcus Liemen - Business Development Accurion

Marcus Liemen

Business Development

Phone:

Mail: ml@accurion.com

Dr. Peter Thiesen - Senior Application Specialist Accurion

Dr. Peter Thiesen

Senior Application Specialist

Phone: +49-551-9996020

Mail: pt@accurion.com

Daniela Bogner - Sales Manager Accurion

Daniela Bogner

Sales Manager

Phone: +49-551-9996013

Mail: db@accurion.com

Linda Thieme - Sales Manager Accurion

Linda Thieme

Sales Manager

Phone: +49-551-9996016

Mail: lth@accurion.com

Sebastian Funke - Application Specialist, 2D Materials Accurion

Sebastian Funke

Application Specialist, 2D Materials

Phone: +49-551-999600

Mail: sfu@accurion.com

Dr. Christian Hoffmann - Application Specialist for Biological Applications Accurion

Dr. Christian Hoffmann

Application Specialist for Biological Applications

Phone: +49-551-9996021

Mail: cho@accurion.com

Stephan Ferneding - Chief Executive Officer Accurion

Stephan Ferneding

Chief Executive Officer

Phone: +49-551-999600

Mail:

Narayana Sharma - Sales and Application Accurion

Narayana Sharma

Sales and Application

Phone: +91-98450 04273

Mail: sharma@accurion.com

Frank Zuo - Sales and Application Accurion

Frank Zuo

Sales and Application

Phone: +86-21 5017 9099

Mail: fz@accurion.cn

Dr. Antonio Gonzalez - Service and LB-Application Specialist Accurion

Dr. Antonio Gonzalez

Service and LB-Application Specialist

Phone: +49-551-9996035

Mail: ago@accurion.com

Arash Mirhamed - Product Manager Accurion

Arash Mirhamed

Product Manager

Phone: +49-551-9996015

Mail: am@accurion.com

Holger Grube - Service Engineer Accurion

Holger Grube

Service Engineer

Phone: +49-551-9996023

Mail: service-halcyonics@accurion.com

SALES / SUPPORT
Logo

nanoparticles

Characterization of Nanoparticles at interfaces by combining imaging spectroscopic ellipsometry and AFM

Poster, WSE2014, Dresden, Germany

The well directed organization of nanoparticles is of increasing technical and scientific interest. One approach is the organization of nanoparticles at the air/water interface for applications, like producing  2D colloidal crystals or nanowires.

For example, Gil et al. (2007) monitored the formation of 2D colloidal crystals by Langmuir–Blodgett technique. They used Brewster angle microscopy to observe the film quality. Zang et al. (2009) have also studied silica nanoparticle layers at the air/water interface by multiple angle of incidence ellipsometry. For data interpretation, they introduce a two-layer model which enables them to evaluate the radius of interfacial aggregates and the contact angle of the nanoparticle surface at the air/water interface

Volinsky and Jalinek (2009) worked with gold nanoparticles. They demonstrate the formation of a network of elongated Au “wires”. The laser-induced structured films exhibited high stability and could be transferred from water onto solid substrates without disrupting the Au organization. To follow the formation at the liquid/solid interface, Brewster angle microscopy was used.

In this work focus on aggregations of nanoparticles in line shaped pattern . Two pattern of SiO2 nanoparticles on a glass substrate were characterized with a spectroscopic imaging ellipsometry and  AFM.

 

Effective medium approach for nanoparticles in colloidal and photonic crystals

Photonic crystals are periodic structures of alternating high/low refractive index domains made of transparent materials. Those crystals can be non-transparent for a particular wavelength range due to multiple reflections and interference in the crystal. Theoretical calculations demonstrate that for fcc (face cubic centred) crystals the ratio between the refractive indices of the different domains must be higher than 2.8 to form a photonic crystal with bandgap. These crystals are used as filters for electro-magnetic radiation, e.g. infrared filters. The filter wavelength depends on the domain size and the refractive index difference between the domains.

CONTACT
© Accurion GmbH 2018